/*
 * Copyright (C) 2016, British Broadcasting Corporation
 * All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the British Broadcasting Corporation nor the names
 *       of its contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#define __STDC_LIMIT_MACROS

#include <limits.h>

#include <bmx/mxf_helper/UniqueIdHelper.h>
#include <bmx/BMXException.h>
#include <bmx/Logging.h>

using namespace std;
using namespace bmx;


UniqueIdHelper::UniqueIdHelper()
{
    mNextId = 1;
}

UniqueIdHelper::~UniqueIdHelper()
{
}

uint32_t UniqueIdHelper::GetNextId()
{
    return GetNextId(mNextId);
}

void UniqueIdHelper::SetStartId(int data_def, uint32_t start_id)
{
    mNextIdByType[data_def] = start_id;
}

uint32_t UniqueIdHelper::GetNextId(int data_def)
{
    if (mNextIdByType.count(data_def))
        return GetNextId(mNextIdByType[data_def]);
    else
        return GetNextId();
}

uint32_t UniqueIdHelper::SetId(const string &str_id, uint32_t suggest_id)
{
    BMX_CHECK(!mIdByStr.count(str_id));

    uint32_t id;
    if (suggest_id == 0) {
        id = GetNextId();
    } else {
        uint32_t next_id = suggest_id;
        id = GetNextId(next_id);
    }
    mIdByStr[str_id] = id;
    return id;
}

uint32_t UniqueIdHelper::GetId(const string &str_id)
{
    BMX_CHECK(mIdByStr.count(str_id));
    return mIdByStr[str_id];
}

uint32_t UniqueIdHelper::GetNextId(uint32_t &next_id)
{
    BMX_CHECK(mUsedIds.size() != UINT32_MAX);
    while (!next_id && mUsedIds.count(next_id))
        next_id++;

    uint32_t result = next_id;
    mUsedIds.insert(result);
    next_id++;

    return result;
}
